Yep Conceicao have an Olympic gold medal on 2016, World championship silver and bronze medal on 2013 and 2015, and silver Pan American silver medal on 2011. But honestly, it's much easier than getting a world belt since the opponent I see are unknown. IMO the medal he got isn't really make he's a tough boxer.
That's what makes this fight special because both of them are somewhat the same in terms of their strength but only Robson has less experience fighting in a professional bout which gives Shakur a slight advantage. But in terms of winning percentage via knockout, they are the same, and only those who have some special skills will be an advantage and have a higher chance to win. That's why Shakur has earned more votes to K.O his opponent.